Work in [1]}, [2]} shows that path loss exponents (PLEs) are remarkably similar over frequencies from 28 GHz to 142 GHz, when referenced to the first meter free space path loss. This means after the first meter propagation, wireless channels at sub-THz frequencies do not provide more loss to signals than the channels at mmWave frequencies. Measurements at 142 GHz have shown that metal surfaces, metal lampposts, glass walls, concrete walls, and marble pillars are good reflectors at sub-THz frequencies. Additionally, work in [3]}, [4]} shows that 1-6 spatial clusters observed at 142 GHz with a 20 dB threshold form the peak for both LOS and NLOS scenarios in an UMi environment, and the number of spatial clusters follows Poisson distributions (statistics are sensitive to noise threshold).
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